Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.14, No.5, 359-364, 1997 High Pressure Vapor-Liquid Equilibria for the HFC125-HFC152a System
We measured vapor-liquid equilibria (VLE) for the system of pentafluoroethane (HFC12)-difluoroethane (HFC152a) over the temperature range from 268.15 K to 373.15 K. Fitting VLE data obtained to an extended BWR equation of state, binary interaction parameters were correlated as a linear function of temperature. Applying the equation of state including the binary interaction parameters to refrigeration cycle, estimation of coefficient of performance (COP) revealed about 13.3% energy-saving against chlorodifluoromethane (HCFC22), when the mole fraction of HFC125 is 0.44. As the condition of COP estimation, we assumed that temperature changes of out-side fluids were from 285.15 down to 280.15 K and 305.15 up to 310.15 K with 3 K in minimum temperature difference, respectively.
Keywords:
Fluorocarbon; HFC125; HFC152a; VLE; Equation of State; BWR Equation of State; Binary Interaction Parameter; Refrigeration; Coefficient of Performance; COP
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